Green synthesis of CQDs for determination of iron and isoniazid in pharmaceutical formulations

Abstract

Camphor leaves were used as the precursor for the hydrothermal synthesis of carbon quantum dots. The preparation method is simple and rapid, and the raw material is environmentally friendly and...

PCB-C4D coupled with paper-based microfluidic sampling for the rapid detection of liquid conductivity

“…The frequency and amplitude of the excitation signal signicantly inuence the output signal of C 4 D and require optimization to determine the optimal excitation signal frequency and amplitude. 45,46 This study investigates the inuence of these two parameters on the output signal of PCB-C 4 D and aims to identify the optimal parameter values. The impact of excitation frequency on the detection results is illustrated in Fig.…”

Preparation and chromatographic evaluation of a mixed polymer brush–silica stationary phase with temperature-sensitive property

“…But very oen, classical singe-mode chromatography, e.g., reversed-phase liquid chromatography (RPLC) for hydrophobic and weak polar compounds, hydrophilic interaction liquid chromatography (HILIC) for highly polar substances, or ion-exchange chromatography (IEC) for charged molecules, are limited in their range of applications. [6][7][8][9] Therefore, achieving the satisfactory separation of many kinds of analytes using one chromatographic column is a desirable goal and has been emphasized in research in separation science. Nowadays, mixed-mode chromatography with multiple retention and excellent separation efficiency has been achieved in one column to separate various types of substances.…”

Fluorimetric determination of Vonoprazan via quenching of nitrogen and sulfur co‐doped carbon quantum dots: A rapid and sustainable analytical approach

“…CQDs have an sp 2 -conjugated structure surrounded by oxygen-including hydroxyl and carboxyl groups. Carbon-based nanomaterials can be chemically modified with various groups, resulting in outstanding physical, chemical, and optical properties [6][7][8][9][10]. These unique properties of CQDs make them highly suitable as fluorescent sensors for a wide range of applications across various fields including bioimaging [11,12], biosensing [13,14], pharmaceutical and metal ion analysis [15][16][17][18][19][20][21], electrocatalysis [22], wastewater treatment [23], and drug delivery [24,25].…”